Screening of Sorghum genotypes for salt-tolerance based on seed germination and seedling stage

Sagar, Ashaduzzaman; Tajkia, Jannat E; Haque, M. M.; Fakir, M. S. A.; Hossain, Alamgir

doi:10.5455/faa.18483

Cited by 11 publications

(9 citation statements)

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“…In contrast, BRRIdhan28 produced the lowest root dry weight (5.304 g hill −1 ) which was statistically similar in PBRC37 (5.401 g hill −1 ). Variation in root dry weight among the cultivars grown under salinity was also observed by different researchers (Power and Mehta, 1997;Uddin et al, 2005;Sagar et al, 2019). The effect of salinity on root dry weight was statistically significant (Table 2).…”

Section: Root Dry Weight Per Hillsupporting

confidence: 73%

“…Salinity is considered as one of the important physical factors influencing rice production. At the present, salinity is the most widespread soil problem in different countries (Roy et al, 2018;Sagar et al, 2019) and is considered as a serious constraint to increased rice production worldwide (Flowers and Yeo, 1981;Chen et al, 2021). There exists tremendous variation for different abiotic stresses such as salt stress within species in rice (Thomson et al, 2010;Khaton et al, 2016;Roy et al, 2018;Rauf et al, 2020;Sagar et al, 2020), providing opportunities to improve crop saltstress tolerance through genetic means.…”

Section: Introductionmentioning

confidence: 99%

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Effect of salinity on morpho-physiological traits at reproductive stages of Oryza sativa

et al. 2022

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Soil salinity is one of the most adverse environmental problems which restricts crop yield. Salinity affects rice plants very badly from germination to its maturity. Therefore, a pot experiment was conducted to study the salinity tolerance of rice genotypes viz. SAL655, STL15, PBRC37, Binadhan-8 and BRRI dhan28. The plants were grown under four salinity levels (0, 6, 9 and 12 dSm−1). Plant height, total number of green leaves hill−1, root dry weight, stem dry weight, total dry weight per hill, root shoot ratio was found to be decreased gradually with gradual increase in salinity levels as compared to the control. The genotype Binadhan-8 and PBRC37 showed the better performance in respect of all the parameters than other genotypes. Therefore, Binadhan-8 and PBRC37 were found more tolerant than other genotypes to salt stress. Progressive Agriculture 32 (2): 117-126, 2021

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Section: Root Dry Weight Per Hillsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Effect of salinity on morpho-physiological traits at reproductive stages of Oryza sativa

et al. 2022

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“…Assessment for seedling vigour (SV) was based on a previous study that used germination capacity, which is the ability of germinating seeds to give normal seedlings, to estimate seedling vigour and represent the extent of salinity damage to the seedling [32]. SV was calculated as the sum of average of the root and shoot vigour, seedling vigour index (SVI) estimated by modified formula suggested by [33][34][35] as the product of seedling vigour (root and shoot length/weight) by germination percentage, while the Relative seedling vigour indices (RSVI) are the percentage of trSVI divided by ckSVI.…”

Section: Seedling Survival and Vigour Evaluationmentioning

confidence: 99%

Quantitative Trait Loci Mapping for Vigour and Survival Traits of Barley Seedlings after Germinating under Salinity Stress

et al. 2021

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Seed germination and seedling establishment are the most critical stages in the barley (Hordeum vulgare ssp. vulgare L.) life cycle that contribute substantially to grain yield. These two phases are exposed to several forms of environmental stresses such as salinity due to high level of salt accumulation in the soil rhizosphere where seed germination takes place and seedlings emerge from. Previously, we have reported genotypic variability and independent QTLs associated with salinity tolerance at seedling and germination stages. However, genotypic studies on revival of a seedling germinating under salinity stress are yet to close the lack of information between germination and seedling stages. Here, we attempt to close the genetic gap by targeting early seedling survival traits in barley after germination under salinity (NaCl) stress and the various seedling vigour indices. Seedling vigour parameters formed the basis for Quantitative trait locus (QTL) linkage mapping in 103 Doubled Haploid (DH) lines of CM72/Gairdner population, and validated the phenotypic response using a selected diverse panel of 85 barley germplasm. The results indicate that 150 mM NaCl stress significantly reduced all the recorded phenotypic traits compared to 75, 90 and 120 mM NaCl. In both DH population and diversity panel barley germplasm, the highest percentage reduction was recorded in shoot length (65.6% and 50.3%) followed by seedling vigour index length (56.5% and 41.0%), while root length (28.6% and 15.8%) and root dry weight (29.3% and 28.0%) were least reduced when control was compared to150 mM NaCl stress treatment. Six QTLs containing 13 significant markers were detected in the DH population, 3 on chromosomes 1H, 8 on 3H and 2 on 4H with LOD values ranging from 3 to 8 associated with seedling survival traits under salinity stress. Three QTLs one on 1H and two on 3H with closely linked significant markers (Bmac0032, bPb-9418 and bPb-4741), (bPb-4576 and bPb-9624) and (bPb-3623, bPb-5666 and bPb-6383) for 1H and two on 3H respectively formed the regions with high possibility of candidate genes. A QTL on 3H flanked with markers bPb-4576 and bPb-9624 that were detected in more than one salinity survival trait and were closely linked to each other will form a basis for detailed studies leading to gene functional analysis, genetic transformation and marker assisted selection (MAS).

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“…However, salt stress induces a variety of responses in plants, including alterations in morphological, physiological and biochemical characteristics [14,15]. For instance, the germination process of different crop plants has become hindered considerably due to ion toxicity under salinity stress [16,17] which further results in less water availability, stunted growth, accumulation of Na + in tissues, less gaseous exchange and nutrient uptake, as well as failure in crop yield [2,18]. High Na + accumulation in leaves causes stomatal closure and malfunctioning of the photosynthetic apparatus and electron transport chain, which leads to decreased photosynthesis and productivity [19,20].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Maize Hybrids (Zea mays L.) for Detecting Salt Tolerance Based on Morpho-Physiological Characteristics, Ion Accumulation and Genetic Variability at Early Vegetative Stage

Huqe

Haque

Sagar

et al. 2021

Plants

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Increasing soil salinity due to global warming severely restricts crop growth and yield. To select and recommend salt-tolerant cultivars, extensive genotypic screening and examination of plants’ morpho-physiological responses to salt stress are required. In this study, 18 prescreened maize hybrid cultivars were examined at the early growth stage under a hydroponic system using multivariate analysis to demonstrate the genotypic and phenotypic variations of the selected cultivars under salt stress. The seedlings of all maize cultivars were evaluated with two salt levels: control (without NaCl) and salt stress (12 dS m−1 simulated with NaCl) for 28 d. A total of 18 morpho-physiological and ion accumulation traits were dissected using multivariate analysis, and salt tolerance index (STI) values of the examined traits were evaluated for grouping of cultivars into salt-tolerant and -sensitive groups. Salt stress significantly declined all measured traits except root–shoot ratio (RSR), while the cultivars responded differently. The cultivars were grouped into three clusters and the cultivars in Cluster-1 such as Prabhat, UniGreen NK41, Bisco 51, UniGreen UB100, Bharati 981 and Star Beej 7Star exhibited salt tolerance to a greater extent, accounting for higher STI in comparison to other cultivars grouped in Cluster-2 and Cluster-3. The high heritability (h2bs, >60%) and genetic advance (GAM, >20%) were recorded in 13 measured traits, indicating considerable genetic variations present in these traits. Therefore, using multivariate analysis based on the measured traits, six hybrid maize cultivars were selected as salt-tolerant and some traits such as Total Fresh Weight (TFW), Total Dry Weight (TDW), Total Na+, Total K+ contents and K+–Na+ Ratio could be effectively used for the selection criteria evaluating salt-tolerant maize genotypes at the early seedling stage.

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Screening of Sorghum genotypes for salt-tolerance based on seed germination and seedling stage

Cited by 11 publications

References 0 publications

Effect of salinity on morpho-physiological traits at reproductive stages of Oryza sativa

Effect of salinity on morpho-physiological traits at reproductive stages of Oryza sativa

Quantitative Trait Loci Mapping for Vigour and Survival Traits of Barley Seedlings after Germinating under Salinity Stress

Characterization of Maize Hybrids (Zea mays L.) for Detecting Salt Tolerance Based on Morpho-Physiological Characteristics, Ion Accumulation and Genetic Variability at Early Vegetative Stage

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